Chemistry - PERIODIC TABLE Question with Solution | TestHub

Energy released, when electron is added in outer most shell of isolated gaseous atom or ions is called electron affinity.$\text{Electron}\text{affinity}\propto \frac{\text{Nuclear}\text{charge}}{\text{Radius}\text{of}\text{atoms/ions}}$

${\text{Li}}^{+}+1{\text{e}}^{-}\to$Attraction
${\text{Li}}^{\text{+}}\text{>}{\text{Na}}^{\text{+}}$electron can reach more nearer to nucleus & Energy released will be highest.